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Pre-41 Front Brake Shackle

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  • Pre-41 Front Brake Shackle

    Have a shackle XF-834, and am not sure of the casting # for various shackles. I have researched Palmer on what I thought was an original early Big Twin shackle, but some things aren't consistent with Palmer. It's 6" long, but looks closer to 33/64" wide at the blade. also, it has two grease fittings. Maybe wear and someone adding a grease fitting explain it, but just wanted to know if anyone can share definitive info based on the casting number? Thanks, Vic.
    Vic Ephrem
    AMCA #2590

  • #2
    This one is about 6-1/8" center-to-center. Does your forging appear to have been plated and/or stripped?
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    • #3
      Tim, That's it ... it may be a hair over 6" center to center. Can you tell me what it is? Big Twin 1940, I hope? It looks like it's older parkerized, and I don't think it's been stripped or plated.

      Thanks,
      Vic
      Last edited by 40 Nuck; 05-17-2008, 12:55 AM.
      Vic Ephrem
      AMCA #2590

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      • #4
        I believe it's a '36-38 because of the two grease fittings on the sides. In '40, the rear fitting was moved to the pivot stud.

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        • #5
          no boss on grease fitting area on 37

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          • #6
            1940 Big Twin Shackle Casting #

            Can someone with a correct 1940 Big Twin front brake shackle tell me what the casting number is on the shackle? Thank you.
            Vic Ephrem
            AMCA #2590

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            • #7
              Originally posted by 40 Nuck View Post
              Can someone with a correct 1940 Big Twin front brake shackle tell me what the casting number is on the shackle? Thank you.
              mine has XF 834F

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